Enhancing the electrocatalytic activity of metal–organic frameworks in the oxygen evolution reaction by introducing high-valent metal centers

Abstract

Metal-organic frameworks (MOFs) have tremendous potential as electrocatalysts for the oxygen evolution reaction (OER), but their performance is often limited by low intrinsic activity. In this study, we demonstrate a...

High-Performance Ni3(HHTP)2 Film-Based Flexible Field-Effect Transistor Gas Sensors

“…The nickel spin–orbit peaks of Ni 2p 3/2 and Ni 2p 1/2 appear at binding energies of 855.9 and 873.7 eV, respectively. The other two peaks can be attributed to the corresponding satellite peaks with characteristic shifts of 860.7 and 879.5 eV, respectively. This result proves that Ni is present in the sample as Ni 2+ and that the synthesized Ni 3 (HHTP) 2 is derived from nickel acetate.…”

“…The high-resolution TEM (HRTEM) images (Figure 2e,f) further confirm the crystalline structure of Ni 3 (HHTP) 2 , and the measured lattice spacing of 1.75 nm corresponds to the hexagonal crystal system and is attributed to the (100) lattice plane of Ni 3 (HHTP) 2 along the crystallographic c-axis. 36,37 To further study the elemental distribution of Ni 3 (HHTP) 2 , the energy-dispersive spectrometry (EDS) element mapping data of Ni 3 (HHTP) 2 is presented in Figure 2g. The elemental mapping shows the distributions of Ni, O, and C elements, which are found on the entire surface of the nanorods, further confirming the successful synthesis of Ni 3 (HHTP) 2 by the in situ synthesis method.…”

Advanced Microwave Strategies Facilitate Structural Engineering for Efficient Electrocatalysis

“…[79] Through meticulous adjustments to the catalyst structure, the synthesis of high-performance electrocatalysts characterized by low overpotential, favorable Tafel slope, and extended service life becomes achievable. [80][81][82] This methodological precision contributes to the exacting control of the electrocatalytic process, thereby culminating in a comprehensive enhancement of performance.…”

Encapsulation of Ferrocene Methylamine in a Metal–Organic Framework for Enhanced Oxygen Evolution Reaction

“…The urgent need to address the environmental impact of hydrocarbon fuels underscores the significance of developing cost-effective and highly efficient catalysts for solar-to-fuel energy conversion. − Electrocatalysis for solar-to-fuel applications offers promising prospects for advancing the field and enabling sustainable energy conversion. In recent years, the unique physical and chemical properties of layered 2D MOFs have garnered significant attention from researchers and found extensive applications in electrocatalysis. , 2D MOFs exhibit a structure reminiscent of graphene, forming a tripodal connection between hexatopic benzene or triphenylene ligands (−OH, –SH, –NH 2 ) and metal nodes, all arranged in a planar configuration with rapid charge mobility and excellent electrical conductivity. − Among these materials, the 2D conductive MOFs formed by the self-assembly of metal ions and 2,3,6,7,10,11-hexahydroxytriphenylene (HHTP) have become the focus of scientific investigation. − The ligands of HHTP are interconnected via π–π bonds, resulting in the formation of a delocalized large π bond and a conjugated structure. , These features facilitate rapid electron transfer rates and endow the material with excellent electrical conductivity, thereby enhancing its electrocatalytic performance. − …”